Manufacture of substance for filling hollow brake-beams.



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U ITE STATES FRANZ SOHUBERT, OF GANSTADT, NEAR BAMBERG, GERMANY, ASSIGNOR TO JOHANN GEORG HELD, OF BAMBERG, GERMANY.

MANUFACTURE OF SUBSTANCE FOR FILLING HOLLOW BRAKE-BEAMS.

SPEGlFIGAEl-ION forming part of Letters Patent No. 723,319, dated March 24, 1903.

Ayplicntion filed November 15, 1902.

.To all whom it may concern.-

Be it known that LFRANZ SGHUBER a snb-- ject of the King of Bavaria, and a resident of 1110" he'rehy declare the following to he a full, 1

clear, and exact description of my invention. The present invention relates to an im proved method for manufacturing a substance which is to he filled into hollow brakeshoes, thus replacing solid iron brake-shoes. The manufacture of such asubstanc'e according to my invention is executed in the following manner: Th ree'parts of asphalt,two parts i of plaster-of-paris, one part of milled leather of the best quality, three parts of quartz, and one partof shellac are eomminnted, relatively pulverized, then completely mixed together, and finally cooked to a pulp. The v substance prepared as ahovedescribed is then Serial No. 131,566. (No specimens.)

filled into forms or directly to the hollow brake-shoe and dried. It was seen that the addition of plaster-of-paris chiefly prevents 'the substance from becoming soft in use,

from which reason the addition of plaster-ofparis also may be increased.

Having now described my invention, what I claim is A" method for manufacturing a snbstance fonhrake-shoes, characterized in this that.

three parts of asphalt and about two parts'of plasten-of-paris, with one part of leather, three parts of quartz and one part of shellac are cooked to a pulp, which is to be filled into hollow brake-shoes.

In testimony whereof I aflix my signature I in presence of witnesses.

FRANZ SCHUBERT. Witnesses: I

HANS SCHUSTER, G. BARD L. 

